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arXiv 0909.0520hep-phastro-ph.COhep-th
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作为暴胀子和热遗迹暗物质的规范单重标量

Gauge singlet scalar as inflaton and thermal relic dark matter

Rose N. Lerner, John McDonald

摘要:

我们表明,通过增加一个规范单重标量S的标准模型,这是非最小耦合到重力,S可以作为暴胀子和热遗迹暗物质。我们得到了(m_s,m_h)参数空间的允许区域,它给出了与观测界一致的谱指数,并且在不违反真空稳定性或非微扰性约束的情况下产生了观测到的暗物质密度。我们表明,在对比的情况下,希格斯暴胀,一旦量子修正包括光谱指数显着大于经典值(N = 0.966,N = 60)的所有允许的希格斯质量m_h。满足约束条件的Higgs质量范围为145 GeV < m_h < 170 GeV。对于具有大的四次自耦合势的实S标量的情况,S质量位于45 GeV < ms < 1 TeV的范围内,对于较小的势,S质量的上限较小。参数空间的一个区域可以通过h-->SS在LHC上直接搜索,而未来的直接暗物质搜索应该能够显着约束模型。

英文摘要:

We show that, by adding a gauge singlet scalar S to the standard model which is nonminimally coupled to gravity, S can act both as the inflaton and as thermal relic dark matter. We obtain the allowed region of the (m_s, m_h) parameter space which gives a spectral index in agreement with observational bounds and also produces the observed dark matter density while not violating vacuum stability or nonperturbativity constraints. We show that, in contrast to the case of Higgs inflation, once quantum corrections are included the spectral index is significantly larger than the classical value (n = 0.966 for N = 60) for all allowed values of the Higgs mass m_h. The range of Higgs mass compatible with the constraints is 145 GeV < m_h < 170 GeV. The S mass lies in the range 45 GeV < ms < 1 TeV for the case of a real S scalar with large quartic self-coupling lambdas, with a smaller upper bound for smaller lambdas. A region of the parameter space is accessible to direct searches at the LHC via h-->SS, while future direct dark matter searches should be able to significantly constrain the model.

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